Posted: 5/11/2025 5:51:09 PM EDT
 Why Are Sig P320s Going Off On Their Own TL:DR - MIM striker safety and incorrect takedown lever. |
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Quoted: Already posted in the big p320 thread and I think is is possible. Attached File There's a lot of discussion on the last few pages of that thread about the mechanics that have been revealed. |
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Quoted: Should we start a betting pool on how long it'll be until the P320 gets discontinued? I don’t think it’s a coincidence that the 365 is being pretty aggressively expanded into larger format versions. I would not be surprised to see that trend continue till it occupies the same space as the 320 and then discontinuing the 320. |
| Possible? Sure. Using the wrong process for a part or mixing up parts could cause all kind of problems. However there is no way there's a $30 price delta between that part being stamped vs MIM'd. If anything the stamped part will be cheaper unless I'm missing something about the complexity of that part. |
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Quoted: Possible? Sure. Using the wrong process for a part or mixing up parts could cause all kind of problems. However there is no way there's a $30 price delta between that part being stamped vs MIM'd. If anything the stamped part will be cheaper unless I'm missing something about the complexity of that part. It sucks as I was a early adopter of the P320, but there is no denying it has a dangerous and deadly design issue. |
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I don't understand why SIG is inspecting every completed gun rather than inspecting the 2 questionable components before they make it to the assembly line. Why wait until the thing is built to identify defective/wrong components? It's too bad. A friend has been a big SIG fan since the 90s. "Accurate Right Out Of The Box." It's twue! It's twue! |
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So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. |
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Quoted:  https://www.youtube.com/watch?v=opM-zDoIRlwTL:DR - MIM striker safety and incorrect takedown lever. I debated on posting this video the other day. Thanks for posting it. I'm curious on the answers. |
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Quoted: So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. Pretty. Much. THIS. But I've given up hope for the scientific method on this issue. There are just too many ax grinders in gun world who still can't accept that their Glock lost. ?? |
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I think it's probably a combination of factors. Quality control issues being a part. That causes some of the discharges. Another part being the triggers are shorter and lighter than other mass issued striker fired handguns and as such they are not as tolerant of errors in handling. This expands the possibility of negligent discharges independent of quality control. But because it's got the reputation of "just going off" officers are less likely to honestly report a negligent discharge as such and all of those would be quickly covered under the "gun is defective" excuse. |
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Quoted: Pretty. Much. THIS. But I've given up hope for the scientific method on this issue. There are just too many ax grinders in gun world who still can't accept that their Glock lost. ?? Quoted: Quoted: So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. Pretty. Much. THIS. But I've given up hope for the scientific method on this issue. There are just too many ax grinders in gun world who still can't accept that their Glock lost. ?? Keep thinking that. The entire gun internet is blowing up about the 320 because of Glock fans. Get real. |
| I spoke with a Sig armorer yesterday in person. They all deny anything is wrong. He disassembled his 320 and explained every part and how it cant go off with out a trigger pull. Im not smart enough to understand everything he explained. They are not backing down. Im skeptical of the un commadid discharges. Hopefully someone can find out whats really happening and end this. I live in N.H. and I am a sig user. They are right down the road from me. |
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Quoted: Ok, so....prove it. Reliably and repeatably in a lab with a box-stock current production P320 of any configuration. Go ahead.....we're waiting....?? Tell me you don't even know what any of the claims are without telling me you don't even know what any of the claims are. Hint: no one has ever said every and any 320 is subject to the problems encountered by some. |
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Quoted: I spoke with a Sig armorer yesterday in person. They all deny anything is wrong. He disassembled his 320 and explained every part and how it cant go off with out a trigger pull. Im not smart enough to understand everything he explained. They are not backing down. Im skeptical of the un commadid discharges. Hopefully someone can find out whats really happening and end this. I live in N.H. and I am a sig user. They are right down the road from me. Its too late to come out with the truth. Sig would go bankrupt. |
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Quoted: Tell me you don't even know what any of the claims are without telling me you don't even know what any of the claims are. Hint: no one has ever claimed every and any 320 is subject to the problems encountered by some. Ok, so....why haven't any of the pistols that OBVIOUSLY were affected by this dark magic and DEFINITELY went off all by their lonesome with NOTHING AT ALL touching the trigger....ever been shown to replicate the issue in court? In a lab? By an independent testing party? I mean, I know the answer....but I don't think you're going to like it. ?? |
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Quoted: So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. Quoted: So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. An argument. This is one particular theory. @50cal Quoted: I did the punch test on both my 320/M17's. They both pass the "disconnector tests" as shown in the video. Checked a coworkers pistol, it failed the test. Have no idea if it makes a difference. Both of mine are manual safety FCU's. His is not. We both watched the video again. He is going to get another trigger bar and see if it makes a difference. Will update with results of his trigger bar swap. So - we have a repeatable test that demonstrates whether the striker block is working as designed. THAT is repeatable. As for the intermittent failures of the sear, what do you not understand about the word intermittent? Officers have been carrying these guns around for years when the striker suddenly slips off the sear - the only way to reproduce THAT failure is to load the gun w/ a primed empty case and OC that unloaded gun around for years. Are you volunteering to OC an unloaded 320 around? B/c we all know how much GD loves OC. |
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Quoted: Pretty. Much. THIS. But I've given up hope for the scientific method on this issue. There are just too many ax grinders in gun world who still can't accept that their Glock lost. ?? Quoted: Quoted: So the argument is that parts are made wrong? They are out of spec and fail? Then it would be easily replicated with those pistols! After an ND incident, the gun would be examined, and broken or worn parts found. The would be able to torque and twist and bump it and make it fire, just like it did when it totally wasn’t caught on a foreign object. If it’s being easily replicated, I’ve missed it. Please point me to that. Pretty. Much. THIS. But I've given up hope for the scientific method on this issue. There are just too many ax grinders in gun world who still can't accept that their Glock lost. ?? ?? holy shit!!!! I'm a Glock fan and I don't give a shit if Sig won or not. At what post count can I jump in at and start bagging on the 320 becuze muh Glock didn't win!!!!????. You seem to have a lot invested in the 320. Did you pop champagne bottles when the announcement was made for the contract? Relax. |
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Quoted: Ok, so....why haven't any of the pistols that OBVIOUSLY were affected by this dark magic and DEFINITELY went off all by their lonesome with NOTHING AT ALL touching the trigger....ever been shown to replicate the issue in court? In a lab? By an independent testing party? I mean, I know the answer....but I don't think you're going to like it. ?? Quoted: Quoted: Tell me you don't even know what any of the claims are without telling me you don't even know what any of the claims are. Hint: no one has ever claimed every and any 320 is subject to the problems encountered by some. Ok, so....why haven't any of the pistols that OBVIOUSLY were affected by this dark magic and DEFINITELY went off all by their lonesome with NOTHING AT ALL touching the trigger....ever been shown to replicate the issue in court? In a lab? By an independent testing party? I mean, I know the answer....but I don't think you're going to like it. ?? Attached File How about by SIG? |
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Oh!! Did they actually make the gun in question detonate a primer?? Oh, they didn't??? Yeah, fail. Good try though!! ?? |
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Quoted: I don’t think it’s a coincidence that the 365 is being pretty aggressively expanded into larger format versions. I would not be surprised to see that trend continue till it occupies the same space as the 320 and then discontinuing the 320. Maybe in the civilian space,l they can do that but they have a contract for that pistol with the .mil they need to get figured out. Maybe the M93 wasn't so long in the tooth after all. |
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Quoted: ?? holy shit!!!! I'm a Glock fan and I don't give a shit if Sig won or not. At what post count can I jump in at and start bagging on the 320 becuze muh Glock didn't win!!!!????. You seem to have a lot invested in the 320. Did you pop champagne bottles when the announcement was made for the contract? Relax. Sorry to burst your bubble but I don't own any 320s. I'm a Glock guy. I just refuse to sit idly by and let the court of public butthurt anti-Sig shitheads stage a witch hunt over something that isn't real. If your last thread of hope on this issue is "well maybe it only happens SOMETIMES but we can't get it to happen on command," then it's not an issue and you're bad at science. |
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Quoted: Problem is admitting a part or design issue. If they do they just opened the door to lawsuits and possible loss of current and future military contracts. It sucks as I was a early adopter of the P320, but there is no denying it has a dangerous and deadly design issue. I also bought a 320 early on and feel like I'm "stuck" with it |
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Quoted: I don't understand why SIG is inspecting every completed gun rather than inspecting the 2 questionable components before they make it to the assembly line. Why wait until the thing is built to identify defective/wrong components? It's too bad. A friend has been a big SIG fan since the 90s. "Accurate Right Out Of The Box." It's twue! It's twue! Probably because it’s not necessarily each individual part, but the tolerance stacking when they’re all put together. Throw in some mislabeled takedown parts, and it’s a recipe for Sig Leg. |
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Quoted: Todays SIG defenders are yesterdays SERPA defenders. So is there something about SERPAs that pull the trigger, or does the design just allow for people with poor handling skills to make mistakes? Guns don’t kill people, people kill people. A mantra at the heart of arfcom, right? It amazes me how quickly people here switch to blaming an inanimate object. |
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Quoted: Oh!! Did they actually make the gun in question detonate a primer?? Oh, they didn't??? Yeah, fail. Good try though!! ?? Quoted: Oh!! Did they actually make the gun in question detonate a primer?? Oh, they didn't??? Yeah, fail. Good try though!! ?? All we know is what SIG told the court in this particular case. They told the court no primers were struck, when there were clearly primers struck. |
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Quoted: Oh!! Did they actually make the gun in question detonate a primer?? Oh, they didn't??? Yeah, fail. Good try though!! ?? Quoted: Oh!! Did they actually make the gun in question detonate a primer?? Oh, they didn't??? Yeah, fail. Good try though!! ?? Sarcasm instead of noticing a gun with a firing pin block indenting primers...in SIG's own tests. |
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Based on the picture in the OP I would say no. Having 1100 P320 go through my hands and going through two different P320 armorer courses before I retired that striker pictured is what looked like the upgraded version that replaced all of the original ones. The strikers that where in the pistols with my department were the original versions when the drop fire video came out. I had seen three different versions of the striker before I left. Any department video we have all seen online line since 2018 should have the newest striker upgrade since December 2017 was when I received the very first batch of 450 pistols from SIG with all of the current revisions at the time. All the unintended discharge videos over the years have been with all the different striker version out there. Also it has been a bit but one of the interesting things if I remember correctly was the MIM safety levers actually had a groove in them to hold the spring leg in place. The stamped ones did not and officers doing unauthorized maintenance would put the striker back in and the spring leg would slip behind the safety lever. Officers were not authorized to detail strip the slide but did it anyway and would put it together wrong or launch the spring and not even know it was no longer in the pistol. After I retired I worked at a local range for a few years. One day I checked the rental pistols and every P320 was missing the safety spring. Clearly whoever was cleaning the pistols did not know what they were doing and launched the spring taking the striker assembly out and probably did even knowing it. |
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Quoted: So is there something about SERPAs that pull the trigger, or does the design just allow for people with poor handling skills to make mistakes? Guns don’t kill people, people kill people. A mantra at the heart of arfcom, right? It amazes me how quickly people here switch to blaming an inanimate object. SERPA holsters suck because they fall apart. |